hellgren



Aug. 16, 1955 G. H. HELLGREN TOTALIZER CONTROL MECHANISM 2 Sheets-Sheet 1 Filed Feb. 15, 1952 INVENTOR:- W .W, BY M, W 5,3144%,

Aug. 16, 1955 G. H. HELLGREN 2,715,496

TOTALIZER CONTROL MECHANISM Filed Feb. 15, 1952 2 Sheets-Sheet 2 IN V EN TOR.

v *pam United States Patent TOTALIZER CONTROL MECHANISM Gustaf Hilarius Hellgren, Enskede, Sweden Application February 15, 1952, Serial No. 271,823

Claims priority, application Sweden February 19, 1951 3 Claims. (Cl. 235-6031) This invention relates to calculating and adding machines of the type having setting means, stop means in said setting means adapted to cooperate with reciprocatable differential members to limit the reciprocating movement of said differential members according to the figure to be transmitted by said differential members and actuator means to a totalizer or from said totalizer to indicator means to disclose the amount accumulated in said totalizer.

It is the object of my invention to provide a calculating or adding machine, in which an amount accumulated in the totalizer can be transmitted to the indicator means, i. e. a total can be taken, independently of the top means in the setting means being set for a figure to be used in subsequent calculating operations after said total taking operation.

It is known for other purposes to guide the differential members in movable supporting means, by which the differential members can be spaced from the stop members so that they are able to move freely past said stop members. Such a. machine is e. g. shown in my U. S. Patent No. 2,303,692.

It is a further object of my invention to provide operating means for such support or like means for spacing the differential members from the stop members when transmitting an amount from the totalizer to the indicator means, i. e. when performing a total-taking operation, so that any figure already set up in the setting means can remain set without disturbing the motion of the differential means occurring during the total taking operation, said operating means being combined with control means for the reversal of the sequence of cooperation between the totalizer and the actuator means.

The foregoing objects and others hereinafter indicated are attained in the embodiment of the invention illustrated in the accompanying drawings, wherein:

Fig. 1 is a side view of the main operating parts of the ice the sense indicated by arrow for each machine cycle. On this shaft 1 is fixed a cam 2, which cooperates with two studs (or rollers) 3 on a Y-formed arm 4, which is mounted for rocking motion on a stud or shaft 5. The cam 2 is shaped so as to impress, when rotating, on the Y-formed arm 4 a clockwise rocking motion at the beginning of the first half of the machine cycle, whereafter arm 4 remains motionless until the first half of the machine cycle is performed, the arm 4 being then returned to its initial position by counter-c1ockwise rocking motion at the beginning of the second half of the machine cycle and remaining motionless during the remainder of the machine cycle.

The Y-formed arm 4 is at 6 pivotally connected with a shifting member 7 (more clearly shown in Fig. 2) having a forked end portion provided with a lower downward open recess 8 and an upper recess 8a. In one rocking position of the shifting member 7 around the stud 6 on the arm 4 the lower recess 8 engages a stud 9 on the lower end of a double lever 11 rotatably mounted on a central shaft 10 and in another rocking position of the shifting member 7 the upper recess 8a engages a stud 9a on the upper end of the double lever 11. The lever 11 is by means of a link 12 connected with a totalizer supporting frame 14 rockably mounted on a shaft 13, the rocking of said frame 14 bringing totalizer wheels 15 in and out of engagement with sector racks 16 which serve as actuators for the totalizer. While specific reference will be hereinafter to only one totalizer 15, it will be apparent that in known manner additional totalizers may be arranged for actuation by the sector bars 16, for example a second totalizer 15a.

A link 18 having one end pivotally mounted on a stud 17 fixed eccentrically on cam 2 (Fig. 1) has its other end linked at 19 to a lever 21 rotatably mounted at 20, and having on its end a stud 22 provided for the actuation of a forked member 23 fixedly mounted on shaft 10. The legs of forked member or fork 23 have their inner edges facing each other arched with a radius equal to the distance between the axis 20 of arm 21 and the outer side of stud 22. Between its legs the fork 23 has a radial slot. On shaft 11 is further fixedly mounted an arm 24, which by means of a transverse bar 25 cooperates with radial extensions 26 on the sector racks 16.

The sector racks (Fig. 2) are by studs 27 connected with one end of bars 28 forming the differential members which with a side extension on their other end are machine, of the control means thereof and of the spacing means included therein.

Fig. 2 is a similar view in which the driving and control means have been excluded to show more clearly the parts situated behind said driving and operating means.

Fig. 3 is a similar view without the driving means but including the control means for total-taking operations illustrating the operative positions of the different parts when actuating said control means.

Fig. 4 is a similar view of a modified embodiment of the essential parts of the device according to the invention, in which certain parts, which are common with the embodiment shown in Figs. 1 to 3, are excluded or broken away for the purpose of better clearness.

Fig. 5 shows a guiding means not visible in Fig. 4.

Fig. 6 shows some of the elements of the machine modified for applying the invention to a machine in which the differential members are movable below the stop means of the setting device.

Referring to Fig. l, 1 is the main driving shaft of the machine, which is operated to perform one revolution in adapted to cooperate with stop members on a stop pin carriage 29, the construction and function of which is generally known and described and shown in my U. S. Patent No. 2,303,692. The sector racks 16 are in a manner also generally known adapted for cooperation with indicator means not shown, such as visible numeral wheels or printing means for the figures entered in the totalizers or for the amounts accumulated in the totalizers when performing a total-taking operation. The differential bars 28 are actioned by springs 31 striving to displace them to the right as seen in the drawing. Such displacement is prevented by the sector racks 16, the extensions 26 of which rest against the transverse bar 25.

The dilferential bars 28 (Fig. 2) are guided on guiding rods 31, which are mounted in a lifting frame 33 rockable between an upper position and a lower position around studs 32. In a lower position of said lifting frame 33 the differential bars, when displaced, cooperate with any stop pin in the stop pin carriage 29 displaced to active position by the setting means not shown, while position.

in the upper position of the lifting frame 33 the differential bars are spaced from the stop-pin carriage enough to keep free from the stop pins set in active position. In the drawing the litfing frame is shown in the upper To operate the litfing of the frame 33, the

same has a stud 34 engaging the forked end of one arm of a bell crank lever 35 the other arm of which is connected by a link 36 with a stud 37 on the Y-formed arm 4. The stud 37 engages a longitudinal slot 38 in the end of the link 36, which slot 38 can be partly covered by the end of a lever 40 mounted for rocking motion on a stud 39 on the link 36.

Pawls 41 (Fig. 2) cooperating with the sector-racks 16 to prevent their counterclockwise rotation are mounted on the shaft 13 and have an extension 42 to the left resting against the underside of a transverse angle bar 43 mounted between the longitudinal side-portions of the frame 33, said extensions being maintained against said angle bar 43 by sprLgs 44. The pawls 41 have a second extension 45 to the right extending over a transverse bar 46, which is fastened on links 47 mounted on the shaft 13. The free end of one of the links 47 has a stud 48 sustaining the left end of the lever 49, the other end of which covers a part of the slot 38 in the link 36 for the stud 37 on the V-formed arm 4. The stud 48 also engages a slot 49 in a rocking member 56, connected with a total-key 52 and mounted for swinging motion around stud 51. The rocking member also has a recess 53, engaged by the bent out end 54 of an extension 55 of the shifting member 7. The recesses 8 and 8a on the shifting member are limited to the left, i. e. on their sides turned away from the Y-formed arm 4 by catches 58, which are normally kept in their position limiting the recesses by a spring 59. The distance between the recesses 8 and 8a is less than the distance between the studs 9 and 9a on the double lever 11.

In an ordinary computing stroke of the machine the shaft 1 and cam 2 are rotated one revolution counterclockwise as indicated by arrow in Fig. 1 from the rest position shown in this figure. This working revolution of shaft 1 or machine cycle is for better clearness of the following explanations assumed to be divided in two half-cycles corresponding each to one half of the revolution of shaft 1 and cam 2. Each of these halfcycles is further divided in three phases of motion, i. e. a first, a second and a third portion of the first or the second half-cycle respectively.

During the first phase of the first half-cycle the Y- formed arm 4 is rocked counterclockwise, remains motionless during the second and the third phases of the first half-cycle, rocks back to its initial position during the first phase of the second half-cycle and remains motionless during the second and the third phases of the second half-cycle. By the link 18, the arm 21 with its stud 22 is rocked counter-clockwise during the first halfcycle and back clockwise during the second half-cycle. The stud 22 moves along the left leg of the fork 23 towards the radial slot during the first phase of the first halfcycle, while the fork remains motionless, thereafter into and out of the radial slot between the legs of the fork 23 during the second phase of the first half-cycle, the fork being thereby rocked counter-clockwise, and thereafter along the right leg of fork 23 during the third phase of the first half-cycle, during which the fork remains motionless. During the second halfcycle corresponding movements are performed in the inverted sequence and in the opposite direction.

During the first phase of the first half-cycle the shifting member 7 is displaced to the left in the drawing. Stud 9, which is engaged in the recess 8, swings the lever 11 counter-clockwise (see Fig. 2), whereby the totalizer frame 14 by means of link 12 is also rocked counter-clockwise and brings the totalizer wheels 15 out of engagement with the sector racks 16. Simultaneously link 36 is displaced to the left, the bell crank lever 35 is rocked clockwise and through stud 34 on the lifting frame 33 the latter is lowered to bring the differential bars 28 at a level for cooperation with the stoppins in the stop-pin carriage 29. The angle bar 43 fixed between the side bars of the lifting frame 33 thereby presses down the extensions 42 on the pawls 41 and rocks these counter-clockwise out of engagement with the sector racks 16. These are then retained from being rotated counter-clockwise under the action of the springs 30 through the differential bars 28 only by the extensions 26 resting against the transverse bar 25.

During the second phase of the first half-cycle (see Fig. 1) the stud 22 on arm 21 engages the radial slot between the legs of the fork 23 and turns the shaft 10 counterclockwise, so that the arms 24 together with the transverse bar 25 are turned counter-clockwise and leave the sector racks 16 free. These are turned counter-clockwise by the springs 30 through the differential bars 25 until these are stopped by the stop-pins set in active position in the stop-pin carriage 29. The totalizer wheels 15, which are rocked out of engagement with the sector racks, are not actuated.

During the third phase of the first half-cycle the stud 22 on arm 21 moves along the inside of the right hand leg of the fork 23 which remains motionless. No operation is performed during this last phase of the first halfcycle.

During the first phase of the second half-cycle the Y- formed arm 4 is rocked clockwise to its initial position. The shift member 7 is displaced to the right and returns the totalizer wheels 15 into engagement with the sector racks 16 by means of recess 8, stud 9, lever 11, link 12 and totalizer frame 14. The position of the sector racks 16 then corresponds to the figures set on the setting means, i. e. to the actuated stop-pins on the stop-pin carriage 29. At the same time the lifting frame 33 is by means of stud 37, link 36, bell crank lever 35 and stud 34 lifted to its upper position in which the differential bars 28 are spaced out of cooperating range with the stop-pins on the stop-pin carriage 29. By this movement of the lifting frame 33 the pawls 41 are returned into engagement with the sector racks 16, their extensions 45 being not retained by the angle bar 43, which thus leaves the pawls 41 free to be rocked clockwise by the springs 44. In the meantime the stud 22 on arm 21 has moved back along the right leg of the fork 23.

During the second phase of the second half-cycle the stud 22 engages the radial slot between the legs of the fork 23 and returns the fork 23, the shaft 1% and the arms 24 with the transverse bar 25 clockwise to the position shown in Figs. 1 and 2. The sector racks 16 are thereby turned clockwise by the transverse bar 25 by means of their extensions 26 and are not prevented therefrom by the pawls 41 which only lock the sector racks 16 against rotation counterclockwise. Thereby the figure set is entered into the totalizer wheels 15 now in engagement with the sector racks 16.

During the third phase of the second half-cycle the stud 22 is returned to its initial position along the left leg of the fork 23.

All parts have now returned to their initial positions illustrated in Figs. 1 and 2 and the machine is ready for a further entering operation.

In order to take a total amount accumulated in the totalizer without taking away a figure set on the stoppin carriage 29, the total key 52, which in a manner known per se may be adapted to start a machine cycle, is depressed.

When depressing the total key 52 to the position shown in Fig. 3, the rocking member 50 is swung counter-clockwise. By means of the slot 49 the stud 43 and by this the links 47 are rocked counter-clockwise, whereby the end of the lever 40 resting on the stud 48 is lifted, said lever is rocked clockwise relatively to the link 36 and thus moves out of position overlying the slot 38. Together with the links 47 the transverse bar 46 is displaced upwards, thereby lifting the extension 45 and rocking the pawls 41 out of engagement with the sector racks 16. Simultaneously the shifting member 7 is rocked to its upper position by the action of the recess 53 on the bent end 54 of the extension 55. The recess 8 on the shifting member '7 thereby is moved out of engagement with the stud 9, while the upper stud 9a presses down the free end of the upper catch 58.

During the first phase of the first half-cycle the arm 21 moves the stud 22 along the left leg of the fork 23 (Fig. l). The shifting member 7 is displaced to the left without actioning the stud 9, but at the end of this displacement the upper catch 58 engages behind the upper stud 9a. The lever 11 is thus not rocked during this phase and the totalizer wheels 15 remain in engagement with the sector racks 16. As the right hand end of the lever 40 is turned away from the slot 38, the stud 37 is free to move along the slot 38 and has thus no action on the link 36. The lifting frame 33 therefore remains in its upper position. The sector racks 16 are then retained by the transverse bar 25 only.

During the second phase of the first half-cycle the fork 23, the shaft it} and the arm 24 including the transverse bar 25 are rocked counter-clockwise by the link 18, the arm 21 and the stud 22, this leaving the sector racks 16 free to be turned counter-clockwise by the springs 30 through the bars 28 according to the amount accumulated in the totalizer, this movement being not disturbed by any figure, which might be set on the stop-pins in the stop-pin carriage 29, the lifting frame 33 being in its upper position.

During the third phase of the first half-cycle the stud 22 moves outwards along the left leg of the fork 23.

During the first phase of the second half-cycle the V- formed arm 4 is rocked clockwise, the shifting member 7 is displaced to the right carrying with it the upper stud 90, whereby the now emptied totalizer wheels 15 are rocked out of engagement with the sector racks 16 through lever 11, link 12 and totalizer-frame 14. The stud 37 on the Y-formed arm 4 travels freely back in the slot 38, so that the link 36, the bell crank lever 35 and the lifting frame 33 remain in their previous positions.

During the second phase of the second half-cycle the fork 23 is swung clockwise by the stud 22, whereby the sector racks 16 are returned by clockwise motion to their initial positions.

During the third phase of the second half-cycle the arm 21 with its stud 22 returns to the initial position along the left leg of the fork 23. As this movement does not perform any special operation, it can advantageously be used to return the total key 52 and the rocking member 50 to their initial positions, which may be effected by means of a catch, which during the total-taking operation retains the total key in its depressed position against the action of a restoring spring and which under the action of the arm 21 at the end of its return stroke is actioned for releasing the total key 52.

In order to permit a total taking operation without emptying the totalizer 15, i. e. for taking a so-called subtotal, a key 52a by which the subtotal taking operation can be initiated may be connected by means indicated in dotted lines in Fig. 3 with a member 52b, which maintains the upper catch 58 depressed, so that the stud 9a is not pulled to the right by the shifting member 7 on its return stroke and the totalizer wheels 15 thereby are maintained in engagement with the sector racks 16 throughout the totaltaking cycle. Thereby the total extracted by the sector racks 16 during the first half-cycle is reentered into the totalizer during the second half cycle. The sub-total key 52a is in this case adapted to rock the rocking member 50 in the same manner as when depressing the total key 52.

The means above described are concerned With the general principles of my invention and its functions during the total-taking cycle and can in this embodiment be directly applied to calculating machines, in which the totaltaking cycle can be performed without any intermediary empty machine-cycle.

Fig. 4 illustrates an embodiment in which the total- 6 taking cycle can be efiected under conditions similar to the above described in a machine, in which an intermediary empty machine cycle must be performed before the total-taking cycle.

According to this embodiment illustrated in Fig. 4 the rocking member actuated by the total key 52 is divided in two parts rockably mounted on shaft 51, one of these parts forming a two-armed lever of which one (the left) end is connected with the total key and-the other (right) end of which has a stud 61, which cooperates in the same manner as the hereinbefore described stud 48 with the lever 40. A bell crank lever 62, which is mounted coaxially with the lever 60 forms the other part of the rocking member and has a recess 63 engaged by the bent end 54 of the extension 55 of the shifting member 7 corresponding to recess 53 in Figs. 1 and 3. The bent end 54 of extension 55 cooperates with a fixed guiding member 54a, shown in Fig. 5 only which in the displacement of the shifting member 7 in the upper rocking position prevents the shifting member from being rocked down to the lower rocking position otherwise than in the extreme right end position of the shifting member 7.

A downwardly extending arm of the bell crank lever 62 is pivotally connected with a bar 64 which on its other end adjacent to Y-formed arm 4 and below stud 37 has a hook 65 adapted to engage a stud 66 on the Y-formed arm 4 so as to rock the bell crank lever 62 counterclockwise when the hook 65 engages the stud 66. The bar 64 with the hook 65 is actioned by a spring 67 striving to rock the bar to bring the hook in engagement with the stud 66. Bar 64 is further connected with the lever 40 by means of a link 68, which in the locking position illustrated of the lever 40 retains the hook 65 lifted out of engagement with the stud 66. The link 68 has a longitudinal slot 69 engaged by a stud fixedly mounted on the bar 64, said slot permitting a certain vertical motion of the hook 65 relatively to the lever 40. The latter lever is actioned by a spring not shown which is stronger than the spring 67 so as normally to maintain the lever 40 in the locking position illustrated in Fig. 4.

One of the two links, which support the transverse bar 46, has in this embodiment the form of a bell crank lever 70. Said transverse bar 46 is in this embodiment shown r as a cylindrical rod and extends under the extensions 45 on the pawls 41. The free arm of the bell crank lever 70 is connected with a rod 71, which in a manner not illustrated is guided for longitudinal displacement parallel with the shifting member 7 and the outer (right) end of which is adjacent to a stud 72 on the shifting member 7 and guided at such a level, that the stud 72 in the lower position of the shifting member 7 passes below the rod 71, but in the upper position of the shifting member 7 engages the end thereof.

A locking means for maintaining the total key 52 in the depressed position during the total-taking cycle and means for releasing said locking means after the totaltaking cycle has been performed are shown in Fig. 4. This locking means consists of a spring actioned catch 73, adapted to engage a stud 74 on the stem of key 52 and connected to a hook 76, which is guided so that when the shifting member 7 is in its upper position said hook engages the bent end 54 of extension 55 and is pulled to the right at the return stroke of the shifting member, thereby disengaging the catch 73 from the stud 74 and releasing the shaft 75 or" total key 52.

The device illustrated in Fig. 4 Works as follows:

When the total key 52 is depressed the lever 60 is rocked counter-clockwise and the left end of lever 40 is lifted by the stud 61, whereby the hook 65 is lowered. The driving means of the machine is simultaneously started, i. e. the machine cycle is initiated.

During the first phase of the first half-cycle the Y- formed arm 4 is rocked counter-clockwise. The stud 37 slides freely along the slot 38 without actioning the link 36, the lifting frame 33 being thus maintained in the upper position. The stud 66 slides in under the lowered hook 65, so that the latter at the end of the rocking movement of the Y-formed arm 4 engages the stud 66. The bell crank lever 62 has remained motionless so that the bent end 54 remains in the lower position and the shifting member 7 is displaced to the left by stud 6 for the disengagement of the totalizer wheels 15. During this displacement the stud 72 moves below the rod 71, which also remains unaffected.

During the second phase of the first half-cycle the trans verse bar 25 is rocked without affecting the sector-racks 16, these being retained by the pawls 41.

During the third phase of the first half-cycle no function is performed, as described in connection with the embodiment shown in Figs. l-3.

During the first phase of the second half-cycle the Y- formed arm 4 is rocked clockwise. The stud 6 returns the shifting member 7 to the right, the stud 37 is displaced freely in the slot 38 and the stud 66 pulls the hook 65 and the bar 64 to the right, so that the bell crank lever 62 is rocked counter-clockwise and the shifting member 7 thereby is rocked to its upper position through recess 63, bent end 54 and extension 55 simultaneously with its displacement to the right, which is allowed by the oblique lower edge of the upper part of the fixed guiding member 54a (Fig. If the totalizer wheels are not entirely returned to engaging position with the sector racks 16 by the displacement to the right of the shifting member 7 because the recess 8 has been lifted off the stud 9 before the shifting member '7 has reached its right end position,

this is of no importance, the sector racks 16 being retained by the pawls 41 and no computing operation having to be performed, but only a transfer operation, which can e. g. be performed during the first phase of the first half-cycle when the totalizer wheels 15 are rocked out of engagement with the sector racks 16 or at any other appropriate time when the totalizers are out of engagement with the sector racks 16.

During the second phase of the second half-cycle the transverse bar 25 returns to its initial position illustrated in Fig. 4.

During the third phase of the second half-cycle no function is performed, as in the previously described computing operation.

The intermediate machine cycle is now ended and the different parts are now in the following positions:

The total key 52 is kept down by the catch 73. The lever 40 is maintained in its clockwise rocked position by the stud 61 and the hook 65 is engaged with the stud 66, whereby the shifting member 7 is maintained ii in the upper position through the bar 64, the bell crank lever 62, recess 63, bent end 54 and extension 55, whereby the stud 72 is at the same level as the rod 71. The totalizer wheels 15 are in an undetermined position, i. e.

either out of engagement, partly engaged or wholly engaged with the sector racks, depending on whether the shifting member 7 during its previous motion to the right and simultaneous lifting has or not left the stud 9 free from the recess 8 before the right end position has been reached.

As the total key is kept depressed by the catch 73, a following machine cycle is immediately initiated.

During the first phase of the first half-cycle now initiated the shifting member 7 is displaced to the left in the upper position and the bent end slides on the upper guiding surface of the guiding member 54a (Fig. 5). Simultaneously the stud 66 on the Y-formed arm 4 is shifted to the left but as the bent end 54 is guided on the guiding surface 54a, the bell crank lever 62 is maintained in its counter-clockwise rocked position, so that the hook 65 does not follow the motion of the stud 66. The stud 9a, as soon as it has been reached by the recess 8a in the shifting member 7, is pulled to the left and brings the totalizer wheels definitely into engagement with the sector racks 16. Simultaneously the rod 8 71 is pushed to the left by the stud '72, the bell crank lever 70 is rocked counter-clockwise and the transverse bar 46 lifts the extensions 45 on the pawls 41 and swings these out of engagement with the sector racks 16. The stud 37 moves freely along the slot 38, which is still kept open, so that the lifting frame 33 remains in its upper position.

During the second phase of the second half-cycle the transverse bar is rocked counter-clockwise, so that the sector racks 16 actioned by the springs through the differential bars 28 are turned counter-clockwise for extracting the total amount accumulated in the totalizer.

During the third phase of the first half-cycle no function is performed as before.

During the first phase of the second half-cycle the shifting member 7 is returned to the right, whereby the totalizer wheels now emptied are rocked out of engagement with the sector racks 16 through the recess 8a and the stud 9a. (For taking a sub-total the upper catch 58 is kept in depressed position, e. g. by a device similar to that illustrated in Fig. 3 in dotted lines, whereby the totalizer wheels are kept in engagement with the sector racks.) The stud 37 moves freely to the left in the slot 38. The book 65 is maintained in its right position by the guiding member 54a, the bent end 54 of extension 55, the recess 63, the bell crank lever 62 and the bar 64 but does not prevent the stud 66 from returning to its initial position. During this return stroke of the shifting member 7 to the right the hook 76 is pulled to the right by the bent end 54, the total key 52 being thus released and returned to its upper position by its restoring spring (not shown) whereby the lever 60 is rocked clockwise. The stud 61 is thereby lowered, the lever 40 returns to its initial position illustrated in Fig. 4 and the hook 65 is lifted by link 68. During the displacement of the shifting member 7 to the right the rod 71 is further released by the returning stud 72 and is displaced to the right by the springs (shown only in Figs. 2 and 3) acting on the extension 42 of the pawls 41, the extensions 45 of which act on the transverse bar 46 and thereby rock the bell crank lever 70 clockwise, the pawls 41 being simultaneously swung out of engagement with the sector racks 16. At the end of the return motion of the shifting member, when the bent end 54 has left the upper guiding surface of the guiding member 54a, the bent end 54 falls down together with the shifting member to the lower position of the latter and the bell crank lever 62, the bar 64 and the hook 65 are returned to their position illustrated in Fig. 4, which corresponds to the starting position for a normal computing cycle.

During the second phase of the second half-cycle the sector racks 16 are returned clockwise to their initial position by the transverse rod 25, which is not prevented by the pawls 41, which slide over the cogs of the sector racks 16.

During the third phase of the second half-cycle the arm 21 (shown only in Fig. l) is returned to its initial position with the stud 22 in the initial position illustrated in Fig. 1.

It will be clear from the foregoing description, that the taking of a total or sub-total in machines with or without intermediate empty cycle can be performed entirely automatically without making it necessary to empty the stop-pin carriage from any figure set thereon and to re-set it after the total taking cycle has been performed.

The invention is not restricted to the embodiments above described. Especially such details which connect such means as the rocking member or 60, and the shifting member 7 with the driving means (Y-formed arm 4) and the controlling means (totalizer frame 14, sector racks 16, lifting frame 33, pawls 41), may be modified or replaced by equivalent means within the scope of my invention.

The invention can also be adapted to machines, in which the differential bars move below the stop-pin carriage. This can be attained by replacing some of the parts with others, which are approximately the upside-down turned image of the members shown in the Figs. 14. Such modified parts are shown diagrammatically in Fig. 6.

As shown in this figure the lifting frame 33a is adapted to be rocked clockwise to bring the differential bars into cooperating range with the stop-pins in carriage 29. For this purpose the bell-crank lever 35a has an upwardly extending arm, which is connected with stud 37 on the Y-formed arm by link 36a, on which the unchanged lever 40 is pivotally mounted,

Though the totalizer or totalizers have been illustrated by a single row of wheels in the accompanying drawings it is evident, that the invention also applies to machines with any known totalizer means, including those having two or several rows of wheels alternately or selectively displaceable into engagement with the actuator racks or other actuator means.

What I claim is:

1. In a calculating machine of the type including at least one totalizer and having, in each digital order, setting means provided with stop members adapted to be selectively set in accordance with a numerical value to be entered in the totalizer, a differential member, and actuator means; a movable support for the differential members, a drive shaft operable through a machine cycle to actuate transfer means to transmit a numerical value set on said setting means to the totalizer; said transfer means including coupling means between said shaft and movable support for displacing the same from normal inoperative position into position for cooperation of the differential members with the stop members of said setting means, means for displacing the actuator means by the associated differential members and to the respective extents determined by the setting of said stops in one direction during a first part of a machine cycle and back in opposite direction during a second part of the machine cycle, an actuating member for moving the totalizer into engagement with said actuator means for cooperation therewith during the second part of the machine cycle; the combination of a manually operable total key adapted when depressed to initiate the operation of extracting an amount accumulated in the totalizer, a rocking control member actuated by said total key, a reciprocatable shifting member adapted for rocking motion between two significant end positions determined by the normal and the actuated positions respectively of said rocking control member, a support portion on said rocking control member, said shifting member controlling the operation of said actuating member to move the totalizer into and out of engagement with said actuator means for cooperation therewith during said second part of the machine cycle for an ordinary computing operation when said rocking member is in normal non-actuated position and to move the totalizer into and out of engagement with said actuator means for cooperation therewith during the first part of the machine cycle for an amount extracting operation when the rocking control member is in the actuated position, retaining pawls cooperating with said actuator means, release means actuated by said rocking control member in actuated position to release said pawls from said actuator means, and means operated by said rocking control member on movement into actuated position to render said coupling means inoperative, whereby the differential members are retained out of cooperating range with said stop members during an amount extraction operation.

2. In a calculating machine of the type including at least one totalizer and having, in each digital order, setting means provided with stop members adapted to be selectively set in accordance with a numerical value to be entered in the totalizer, a differential member, and actuator means; a movable support for the differential members, driving mechanism, and coupling means between said driving mechanism and said movable support to displace the same from normal inoperative position into position for cooperation of the differential members with said stop members of the setting means on operation of said driving mechanism to enter a numeral value in the totalizer; in combination a manually operable total key adapted when depressed to initiate first an idle machine cycle and thereafter a second machine cycle for extracting an amount accumulated in the totalizer, a first rocking control member operated by the total key, a second rocking control member operated from the driving mechanism of the machine through disconnectable means, a supporting portion on said second rocking control member for a reciprocatable shifting member adapted for rocking motion in one of two significant end positions determined by the position of the second rocking control member, said shifting member being adapted when reciprocated in one position to operate the shifting of the totalizer into and out of engagement with the actuator means for cooperation therewith during the second part of the machine cycle for an ordinary computing opera tion and when reciprocated in the other position to operate the shifting of the totalizer into and out of engagement with the actuator means for cooperation therewith during the first part of the machine cycle for an amount extracting operation, retaining pawls adapted for cooperation with said actuator means, means actuated by said first rocking control member on operation thereof to render said coupling means inoperative, thereby to maintain the movable support in a position in which said differential members are spaced out of cooperating range with the stop members in said setting means, said first rocking control member being adapted, when operated by the total key, to move said disconnectable means in a position ready for engagement with the driving means at the end of the first idle machine cycle to actuate the second rocking control member to a position in which the shifting member is held in the position for shifting the totalizer into and out of engagement with the actuator means for cooperation therewith during the first part of the second machine cycle, actuating means for releasing said pawls, and cooperating means operably connected with the first rocking control member and with the shifting member for operating said actuating means to release said pawls from engagement with the actuator means during the second machine stroke.

3. In a calculating machine as claimed in claim 2, wherein said cooperating means on the reciprocatable shifting member displaces the cooperating means of the first rocking control member to cooperate with the actuating means for the pawls in that position of the shifting member corresponding to the shifting of the totalizer into and out of engagement with the actuator means for cooperation therewith during the first part of the machine cycle for extracting an amount accumulated therein, and wherein said cooperating means on said reciprocating shifting member in the other position thereof displaces the cooperating means of the first rocking control member out of range of cooperation with said actuating means for releasing said pawls.

References Cited in the file of this patent UNITED STATES PATENTS 1,336,904 Hopkins Apr. 13, 1920 2,247,938 Bower July 1, 1941 2,303,692 Hellgren Dec. 1, 1942 2,515,692 Boyden et al July 18, 1950 

